Value Collection 409218PR Set Screw 9/16-12 X 4 in Cup Point

Product Description

The VALUE COLLECTION 409218PR is a 9/16-12 x 4-inch cup point set screw manufactured from Grade 2 alloy steel. Set screws are headless fasteners threaded along their full length, designed to secure a component — such as a collar, gear, or pulley — against or onto a shaft by applying direct clamping force at the point of contact. The cup point geometry creates a circular indentation in the mating surface, providing strong rotational and axial holding power. This fastener uses a square drive, which accepts a square key or broach-style driver. Installation is performed by machinists, millwrights, and maintenance mechanics working on rotating equipment and mechanical assemblies.

This set screw is suited for general mechanical and industrial applications requiring a reliable shaft-locking fastener. The 9/16-12 thread size follows Unified National Coarse (UNC) standards, making it compatible with standard UNC-tapped holes in hubs, collars, couplings, and similar components. Length is measured under head — at 4 inches, this fastener is appropriate for applications requiring deep thread engagement or extended grip in thick workpieces. The cup point style is among the most common point types used in production and maintenance environments.

Key Features

• Cup point geometry creates a positive indent in the mating shaft surface for firm rotational and axial retention
• Square drive accepts standard square key drivers for high-torque installation in confined spaces
• 9/16-12 UNC thread size follows standard fractional inch Unified National Coarse specification
• 4-inch length measured under head provides deep thread engagement for thick hub or collar applications
• Grade 2 alloy steel construction offers solid mechanical strength for general industrial service
• Fully threaded headless design allows flush or sub-flush seating in the tapped hole

Compatibility

Designed as an OEM-style replacement or standard-stock set screw for any UNC-tapped 9/16-12 hole requiring a cup point, square drive fastener in mechanical assemblies such as shaft collars, couplings, sprockets, and pulleys.

Installation Notes

Installation is typically performed by machinists or millwrights using a square drive key or bit rated for the fastener size. Depower and lock out the equipment before servicing any rotating shaft assembly. Ensure the tapped hole is clean and free of debris before threading in the fastener. Do not exceed the rated torque capacity of the drive recess, as overdriving square drive fasteners can strip the socket or the hole.